Exercises 2.3, page 67

1. Trapezoid
3. ${8900 ft}^{2}$ ${8900 ft}^{2}$
5. 340 m
7. 33.24 in.
9. 12.8 m
11. 2.144 ft
13. ${41 mm}^{2}$ ${41 mm}^{2}$
15. ${23.5 in.}^{2}$ ${23.5 in.}^{2}$
17. ${9.3 m}^{2}$ ${9.3 m}^{2}$
19. ${2.000 ft}^{2}$ ${2.000 ft}^{2}$
21. $p = 4 a + 2 b$ $p = 4 a + 2 b$
23. $A = b h + a^{2}$ $A = b h + a^{2}$
25. It is a rectangle.
27. ${288 cm}^{2}$ ${288 cm}^{2}$
29. $360 °$ $360 °$
31. $A = a (b + c) = a b + a c;$ $A = a (b + c) = a b + a c;$ distributive law
33. The diagonal always divides the rhombus into two congruent triangles. All outer sides are always equal.
35.
1. 344 m
2. ${996 m}^{2}$ ${996 m}^{2}$
37. ${1470 ft}^{2}$ ${1470 ft}^{2}$
39. 0.84 gal
41. $w = 36.7 cm, h = 22.9 cm$ $w = 36.7 cm, h = 22.9 cm$
43. ${3.04 km}^{2}$ ${3.04 km}^{2}$
45. $360 °$ $360 °$ . A diagonal divides a quadrilateral into two triangles, and the interior angles of each triangle are $180 °$ $180 °$ .

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Table of Contents for Exercises 2.3, page 67